Carbureter.



P. 1.. A TATOM.

` CARBURETBB. APPLIOATION'IILED SEPT. 13,1912.

Patented June 1914.

2 SHEETS-SHEET 1.

I um TTORNEYS F. L. TATOM.

GARBURBTBR.

APPLICATION FILED SEPT. 13, 1912. 1,099,828. Patented June 9,1914.

2 SHEETS-SHEET 2.

WITNESSES y /NVE/VTI? ATTORNEYS FLETCHER LOTHAIR TATOM, 0F BROOKLYN, ALABAMA..

CARBURETER.

Specification of Letters Patent.

Patented June 9, 1914.

Application led September 1 3, 1912. Serial N o. 720,140.

To all 'whom t may concern:

Be it known that I, FLETCHER L. TAToM, a citizen of the United States, and a resident of Brooklyn, in the county of Conecuh and State of Alabama, have invented a new and Improved Carburetor, of which the following is a full, clear, and exact description.

My invention relates to an improvement in carbureters of the type that is mostly employed for supplying combustible mixture to a gas engine; and the primary object of my invention is to provide a device of this sort which will be exceedingly efficient and absolutely safe in operation.

Reference is to be had to the accompanying drawings forming a part of this specification, in which the same characters of reference indicate the same parts in all the views.

Figure 1 is a vertical longitudinal section of my carbureter taken as a whole; Fig. 2 is a side elevation of certain parts of the same; Fig. 3 is a vertical longitudinal sectional view of part of the spraying apparatus; Fig. 4 is a top plan of the spraying apparatus; Fig. 5 is a to plan of a detail, showing the location of tie atomizer tubes; and Fig. 6 is a top plan of the controlling valves by means of which one or more of the atomizer tubes can be thro-wn into or out of commission. n

My carbureter comprises a dome 1 form` ing a spray chamber and having a projecting screw-threaded boss 2 to enable the dome to be mounted upon a hollow base 3, which incloses the float chamber containing ,the liquid fuel. The dome 1 is provided with an'outlet pipe 4, and this pipe 4 communicateswith a conduit 5 which leads to the intake Valves of the engine on which the carbureter isused.

The base 3 has a drain cock 6 and a hollow projection 7 having an opening through which air passes, and a threaded boss 9 to receive a ipe which supplies fuel to the float cham er. This boss 9 has an aperture 10 therethrough controlled by a needle valve 11 which is connected by a pin 12 to a lever' 13. The pin 12 moves in guides 14 in the projection 7, and the lever 13 is pivoted at 15 and is rigidly connected at its other end to a float 16 having a central bore 17. When the level of the liquid in the float chamber sinks, the valve 11 will be lifted to allow some liquid to flow into the chamber, and as soon as the chamber has been4v filled the float willmove the valve 11 in a position to close the bore 10.

Passing through the bore 17 are a plurality of tubes 18 which communicate at their lower ends with a hollow head 19, the bottom of which is closed by a sheet of foraminous material 20. These tubes 18 are bent outward as shown at 21 above the float 16, and then upward again along the side of an atomizer chamber 22. The tubes 18 are preferably arranged in pairs, and the ends of each pair are bent over and toward each other as shown at 23, and in practice air or other gas under pressure will pass through the atomizer chamber 22, past the bent-over ends 23 and exert an aspirating action thereon, with the result that some of the liquid in the float chamber will be drawn up through the tubes 18 and sprayed into the interior of the dome l, so as to miX with the air therein and form a'combustible mixture.

Leading from the aspirator chamber 22, are a plurality of tubes 24 which communicate through openings 25 in the top 26, with the interior of this chamber. The openings 25 are controlled by means of a rotary valve 27 having a circumferential notch 28 and held against the under side of the top 26 by means of a spring 29. This notch 1s large enough to uncover all of the openings 25, so that all of the tubes 24 can be employed and so that one or all of them may be put out of commission. This valve 27 is operated by a stem 30 having a polygonal portion 31 which passes through a correspondingly shaped opening32 in the valve 27, and has 'a reduced portion 33 which ts into astep bearing 34 formed in the bottom of the chamber 22.

The aspirator chamber 22 is supplied with gases under pressure through a tube 35and 1s supported near the top of the base 3 by means of arms or brackets 36. The stem 30 is operated by an arm 37 connected to a link 38, and this link 38 is pivotally connected to an arm 39 which operates aiy damper 40 in the pi e 41, and a similar arm which operates a amper 42 in the conduit 5.

43 is an operating lever leading to a connection adjacent the seat of the driver to enable the fuel supply to be regulated as desired. The outlet end of the pipe 4 may be screened by a wire mesh, as shown at 44. j The dome 1 inclosing the spray chamber has a water jacket 45 in its wall supplied with a heating agent through a pipe 46, and

- ends 28 of the tubes 18. As a result, the oil,

which may be gasolene,'will be drawn up into the chamber 1 to form a mist within this chamber. The air passing in through the opening 8'will rst enter the chamber 1 and then pass out through the pipe 4 into the supply header 5. In its passage it will take up enough gasolene to form a combustible mixture, and in operation the interior of the spray chamber will be covered With a film of gasolene which will coperate with the spray formed by the tubes 18, to make a y more thoroughly saturated mixture.

As stated above, a number of tubes 24 which are in operation will be regulated by the lever 43, and'throu h the connection described this lever will simultaneously set the dampers 40 and 42 so that the more .blast tubes there are in operation the greater will be the extent to which these dampers are opened. l

The compressed 4air supply through the pipe 35 may come through a reservoir which can be filled by a 'pump driven by the engine. If desired, however, a part of the exhaust gases from the engine may be supplied to the piple 35 to produce the spray required. These eX aust gases will of course dilute the fuel mixture to some extent, but as they will consist mainly of nitrogen and carbon-dioxid,

Vwhich are entirelyinert, this drawback will be more than offset by the fact that the use of these exhaust gases will obviate any daner of the carbureter exploding or catching It is to be further observed that with the spraying devices entirely inclosed inside of the structure of the carbureter, the danger of any of the passages becoming clogged by the formation of ice due to the presence of moisture in the airis entirely eliminated. This is due to the fact that the housing of the spraying devices vinside of the carbureter protects them against cold, and the assages through which the air is passed insi e of the carbureter can be given suflicient dimensions to obviate the likelihood of any obstruction due to the formation of ice.

I wish to have it understood that the above description is illustrative only, and that it `discloses but one embodiment of my invention, and, I do not care to be limited to the exact details shown and described, but wish l to reserve to myself the right to make such changes in the shape, size and arrangement of the arts as fairly fall within the scope and spirit of my invention.

Having thus described my invention, I claim as new and desire to secure by Letters Patent: g l l. The combination cfa hollow base having a liquid fuel supply chamber and a spray chamber above the fuel supply chamber, spraying devices for su plying liquid fuel to the spray chamber, sai ase having means for conducting air tothe spray chamber, an outflet pipe leading from the spray chamber,

and a conduit connected with the outlet pipe, valves in said conduit and said pipe, a valve for regulating the spraying means connected with said valve and with vthe valves in said conduit and pipe to en able the valves to be regulated together.

2. A spraying device comprising an atomizing chamber having a plurality of openings in its top at one side thereof, and blast tubes extending from the top at one side and communicating through said openings with the interior of the chamber, a rotary valve inside the chamber and having 'a circumferential notch adapted to uncover` all of said openings, the said valve being arranged to close one or more of said openings, a plurality ofA liquid fuel supply tubes, each of` said tubes adapted to have one end immersed in a source of liquid fuel supply, each tube extending upward along the side offsaid atomizin chamber and having its other end locate adjacent the .outer end of one of the blast tubes, and a tube connectedwith the atomizing chamber for supplying the same with air or gas under pressure. L

3. The combination of fuel spraying means, including an atomizing chamber, means for supplying air to said chamber to operate the fuel spraying means, an outlet conduit for discharging the air and fuel, a conduit connected to said outlet conduit, a valve in each of said conduits, a valve in said atomizing 'chamber for regulating the supply of air to the spraying means, and means connected to the valves in said conduits and the valve in the atomizing cham ber to operate the valves in unison.

4. In a carbureter, an atomizing chamber, means for supplying air or gas under pressure thereto, a plurality ofblast tubesleadin from the top o said chamber, a plurality o fuel supply tubes having their ends i-n proximity to the outlet ends of said blast. tubes, a rotary disk valve in saidchamber a spring for holding said valve against the under side of the top of said chamber, the said valve controlling the communication of said blast tubes with the interior of the chamber, a stem connected with the valveI and extending through the top of said chamber, and

means connected wlth said stem for operating the valve. v

5. The combination of a chamber, means for supplying air thereto, said chamber havevices, 'and ing a plurality of blast tubes leading from the top at one side thereof, means for supplying fuel associated with each of said blast tubes, and means in said chamber for shutting olf one or more of the said blast tubes from communication with the chamber.

6. The combination of a chamber, means for supplying air thereto, said chamber having a plurality of blast tubes leading from the top at one side thereof, a disk valve in said chamber having a part cut away at its periphery to expose the inner ends of said tubes, and fuel supply tubes extending outside of said chamber at one side thereof and associated with each of said blast` tubes said valve permitting one or more of said blast tubes to be shut off from communication with the inside of the chamber.

7. The combination of ahollow base having an air inlet opening and forming a fuel supply chamber, a hollow dome mounted upon said base and forming a spray chamber communicating at its bottom with the said air inlet in the base, an outlet pipe leading from the spray chamber, a conduit connected with the outlet pipe, valves in said conduit and said pipe, an atomizing chamber supported near the top of the base, blast tubes extending upward from the atomizing chamber, liquid fuel supply tubes having one end extending into the liquid fuel supply chamber and immersed in the liquid therein, the other ends of said tubes being located adjacent the upper or outlet ends of the blast tubes, means for supplying air or gas under pressure to the atomizing chamber to draw liquid fuel through the said liquid supply tubes, and spray the same into the interior of the spray chamber, a valve in said atom.- izing chamber for controlling the blast tubes, and means connected with said valve and with the valves in the conduit an outlet pipe for simultaneously regulating said va ves.

8. The combination of a fuel supply chamber having an air inlet, a spray chamber mounted on the fuel supply chamber and communicating at its lower end therewith, an atomizing chamber supported in the upper part of the-fuel suppl chamber, above the level of the liquid t erein, the said atomizing chamber having a plurality of openings in its top adjacent the periphery, a series of blast tubes extending from the top of said chamber toward the spray chamber and communicating through said o enings with the interior of said atomizing c amber, means for supplying air or gas under pressure to said atomizing chamber, a rotary disk valve in said chamber, and having a circumferential notch adapted to uncover the said openin s in the top of said chamber, means for olding the valve against the underside of said top, a plurality of fuel supply tubes extending at the side of said atomlzing chamber and having' their upper ends in proximity to the outlet ends of said blast tubes, the lower ends of said fluid supply tubes extending into the fuel supply, and means for 0 rating the valve to close one or more of tEd said blast tubes.

9. In a carbureter, an atomizing chamber, means for supplying air or gas under pressure thereto, blast tubes leadingfrom the top of said chamber, a spring-pressed disk valve in said chamber adapted to expose the inner ends of said tubes, a plurality of fuel supply tubes arranged outside of said chamber and having their upper or outlet ends located in proximity to the outer ends of the blast tubes, a hollow head withwhich the lower or inlet ends of said fuel supply tubes communicate, the said head having a foraminous bottom, and means for operating the valve to closeone or more of said blast tubes. In testimony whereof I have signed my name to this specification in the presence of two Asubscribing witnesses.

FLETCHER LOTHAIR TATOM.

Witnesses:

MARVIN T. LILEs, BYRON TIsDALn. 

